Carbon contact.



No. s2a,n5. 'Patented July 4, I899.

= E. PETTET.

CARBON CONTACT.

(Application filed. Feb. 27, 1899.)

(,No Model.)

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UNITED STATES PATENT OFFICE.

ELZA PETTET, OF FARMER CITY, ILLINOIS.

CARBON CONTACT.

SPECIFICATION forming part of Letters Patent No. 628,115, dated July 4, 1899.

Application filed February 27,1899. Serial No. 706,970. (No model.)

To aZZ whom it may concern:

Be it known that I, ELZA PETTET, a citizen of the United States, residing at Farm er City, in the county of De Witt and State of Illinois, have invented certain new and useful Improvements in- Carbon Contacts, of which the following is a specification.

My invention relates to an improved carbon contact adapted for series, are, or incandescent electric lighting; and the object of my invention is the provision of a simple, inexpensive, reliable, and thoroughly practical invention of this character..

To attain the desired objects, the invention consists of a carbon contact embodying novel features of construction and combination of parts, substantially as disclosed herein.

The figure represents a section of a carboncontact mechanism constructed in accordance with and embodying my invention.

Referring by letter to the drawing, A designates a box or casing preferably made of cast-iron and provided on the top with a suspension hook or eye B and further provided with the cover or lid 0, fitting snugly in the box and secured by the bolts D, having thumbscrews E, by means of which the lid may be readily removed when found desirable or necessary. Upon the inner face of the lid is secured the porcelain base F, having the central opening F, in line with the threaded sleeve G, carried by the lid, and also provided with the two openings F which lead to the brass castings H and H,respectively, the casting H having a socket H and the casting I-I having a socket H in each socket there being placed a carbon J and in the socket H there being a spring K to force the carbons normally toward each other, they being separated by an intermediate piece of paper or like material L.

To the top of the box or case on each end are attached by bolts M the insulators N, to

which is connected the conductor 0, which forms a loop and enters the box through the openings F and thence passes to the screws P, which connect with the brass castings, and thence to the lamp through the opening F of the base and the threaded sleeve G, as will be readily understood.

From the foregoing description, taken in connection with the drawing, it is evident that should the lamp become burned out or other-wise destroyed, and thereby break the circuit, the increased force of the electric current will burn the paper between the carbon contacts and cause them to come together, completing the circuit, and allow the current of electricity to pass uninterrupted, thus producing a reliable and practical improvement.

I claim In a carbon-contact mechanism, the combination of a case or box having a lid or cover, a porcelain base mounted upon said lid and provided with openings, which coincide with openings in the lid, castings secured on said base upon opposite'ends thereof and provided with sockets, a stationary carbon detachably secured in the socket of one casting, a spring mounted'in the socket of the other casting, another carbon detachably secured in said last-mentioned socket and adapted to be contacted by the spring, a sheet of paper adapted to be held in place between the ends of the carbons by the spring-actuated carbon, insulators upon the exterior of the box, and condoctors connected to the insulators from thence through the lid to the castings, and then to the lamp.

In testimony whereof I affix my signature in presence of two witnesses.

ELZA PETTET.

WVitnesses:

L. R. I-IEERICK,- OHAs. WEBB. 

